Jackstone n. : One of the pebbles or pieces used in the game of jackstones.

Jackstone n. : A game played with five small stones or pieces of metal. See 6th Chuck.

Example:
who do you think would win. federer or henin if they battle on a Jackstone match?

Taxonomy
signage design, Jack Stone, Stone Signs, electrical sign manufacturer, QUALITY SIGNS, landover maryland, SIGN COMPANY, fabrication, environmental graphics, environmental design, digital printing, landover md, CREATIVE DESIGN, full service, Greater Washington DC.

Defination from the web:
Manufacturer offers interior and exterior signage, digital printing and sign repairs.